Totally different car, but I had that problem once. Lie on the ground underneath the passenger door with it open and look at the bottom of the door. There should be several drain holes, for the rain that (always/normal) gets past the weather stripping against the window. If those are plugged up the water will fill up the door and leak into the car. Strange but true.
You can temporarily unclog the holes with a stick, but for a permanent fix you will want to remove the inner door panel and use a Shop-Vac. GW
LEE wrote: